Progressing cavity pump

Details Progressing cavity pump Progressing cavity pump

1974-11-27

1977-06-14

Cohen, Irwin C.

Rotary expansible chamber devices

Unlike helical surfaces on relatively wobbling rotating...

92170, 418153, F01C 504, F04C 106, F04C 500

Patent

active

040294439

ABSTRACT:
An improved progressing cavity pump of the Moineau type having a helically externally threaded rotor coacting with an internally helically threaded stator. In a Moineau pump where the pump casing is a singular tubular unit, the stator is bonded to the casing with an adhesive. When the pumps are used with a corrosive fluid, such as caustic soda, the adhesive is attacked and the stator becomes free to rotate. To prevent the stator from rotating, a rib is attached along a portion of the casing. The rib restrains the stator and prevents its rotation.

REFERENCES:
patent: 1456171 (1923-05-01), Woodward
patent: 1529911 (1925-03-01), Norling
patent: 2527670 (1950-10-01), Allen
patent: 2826152 (1958-03-01), Michie
patent: 3439586 (1969-04-01), Holtan et al.
patent: 3479960 (1969-11-01), Cardoso

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